this.original = checkNotNull(original);
    }

    @Override
    public boolean matches(char c) {
      return !original.matches(c);
    }

    @Override
    public boolean matchesAllOf(CharSequence sequence) {
      return original.matchesNoneOf(sequence);
    }

    @Override
    public boolean matchesNoneOf(CharSequence sequence) {
      return original.matchesAllOf(sequence);
    }

    public String toString() {
      return "IncompatibleKeyType";
    }
  }

  protected final boolean supportsPut;
  protected final boolean supportsRemove;
  protected final boolean supportsClear;
  protected final boolean allowsNullKeys;
  protected final boolean allowsNullValues;
  protected final boolean supportsIteratorRemove;

  /**
   * Creates a new, empty instance of the class under test.
   *

    @SuppressWarnings("EqualsHashCode")
    @Override
    public boolean equals(@Nullable Object other) {
      return (other instanceof ClassWhichIsAlwaysEqualButHasDifferentHashcodes);
    }
  }

  private static class ObjectWhichIsEqualButChangesClass implements Serializable {
    private static final long serialVersionUID = 1L;

    @Override
    public boolean equals(@Nullable Object other) {

    @SuppressWarnings("EqualsHashCode")
    @Override
    public boolean equals(@Nullable Object other) {
      return (other instanceof ClassWhichIsAlwaysEqualButHasDifferentHashcodes);
    }
  }

  private static class ObjectWhichIsEqualButChangesClass implements Serializable {
    private static final long serialVersionUID = 1L;

    @Override
    public boolean equals(@Nullable Object other) {

     */
    boolean isOffline();

    /**
     * Enables/disables network access to remote repositories.
     *
     * @param offline {@code true} to disable remote access, {@code false} to allow network access.
     * @return This request, never {@code null}.
     */
    RepositoryRequest setOffline(boolean offline);

    /**

    private final List<MavenProject> sortedProjects;

    private final Map<Key, List<MavenProject>> cache = new ConcurrentHashMap<>();

    private record Key(MavenProject project, boolean transitive, boolean upstream) {}

    /**
     * Creates a new project dependency graph from the specified graph.
     *

    /**
     * Gets a Boolean value from the map with a default value.
     *
     * @param map The source map
     * @param key The key to look up
     * @param defaultValue The default value to return if key doesn't exist or value is null
     * @return The Boolean value, or defaultValue if not found
     */
    public static Boolean getBoolean(final Map<String, Object> map, final String key, final Boolean defaultValue) {

    }

    /** {@inheritDoc} */
    @Override
    public boolean isSnapshot() {
        return artifact.isSnapshot();
    }

    /** {@inheritDoc} */
    @Override
    public int compareTo(Artifact a) {
        return artifact.compareTo(a);
    }

    /** {@inheritDoc} */
    @Override
    public void setResolved(boolean resolved) {
        artifact.setResolved(resolved);
    }

    public boolean equals(@Nullable Object obj) {
      if (obj instanceof SameCharacterInstance) {
        SameCharacterInstance that = (SameCharacterInstance) obj;
        return i == that.i;
      }
      return false;
    }
  }

  static class SameBooleanInstance {
    private final Boolean i;

    public SameBooleanInstance(Boolean i) {
      this.i = checkNotNull(i);
    }

        return t;
    });
    private volatile boolean asyncLogging = true;
    private volatile boolean shutdown = false;

    // Event statistics
    private final Map<EventType, AtomicLong> eventCounters = new ConcurrentHashMap<>();
    private final Map<EventType, AtomicLong> eventTimings = new ConcurrentHashMap<>();

    // Configuration
    private volatile boolean enableJsonLogging = true;